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United States Patent | 6,076,812 |
Lisi | June 20, 2000 |
The invention concerns a mixing and aeration unit, especially for waste water treatment and including a submersible axial flow mixer (2), an elongated jet ring (6) with inlet (6a) adjacent the mixer propeller (3) and housing a number of air bubble diffusers (10).
Inventors: | Lisi; Arnaldo (Arese MI, IT) |
Assignee: | ITT Manufacturing Enterprises (Wilmington, DE) |
Appl. No.: | 970863 |
Filed: | November 14, 1997 |
Nov 20, 1996[IT] | MI96A2501 |
Current U.S. Class: | 261/92; 261/93; 261/122.1 |
Intern'l Class: | B01F 003/04 |
Field of Search: | 361/28,36.1,37,77,84,93,92,122.1,29 |
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3865721 | Feb., 1975 | Kaelin | 361/93. |
4431597 | Feb., 1984 | Cramer et al. | 261/93. |
4512936 | Apr., 1985 | Oshima et al. | 261/93. |
4514343 | Apr., 1985 | Cramer et al. | 261/93. |
4581182 | Apr., 1986 | Cramer et al. | 261/93. |
4710325 | Dec., 1987 | Cramer et al. | 261/93. |
Foreign Patent Documents | |||
756252 | Mar., 1971 | BE | 261/93. |